I've beaten every mainline Assassin's Creed to date. Crazy, I know.
I used to be able to not have to add that goofy "mainline" qualifier in, but the series has become so bloated with mobile spinoffs that it's impossible to keep up with. You know it, I know it, and even Ubisoft knows it, which is why they opted to skip an entire year to lay low for a while. 2016 marked the first time in a while (2008) where there wasn't a big annual Creed, which is kind of a big deal.
It's refreshing that Ubisoft was able to exercise restraint, because Assassin's Creed Origins benefits from eschewing the puppy mill style of game production.